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Publication numberUS2872066 A
Publication typeGrant
Publication dateFeb 3, 1959
Filing dateMay 2, 1955
Priority dateMay 2, 1955
Publication numberUS 2872066 A, US 2872066A, US-A-2872066, US2872066 A, US2872066A
InventorsPiker Herbert M, Schultheiss Alvin J
Original AssigneeHamilton Skotch Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spring lock
US 2872066 A
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Description  (OCR text may contain errors)

Feb. 3, 1959 H. M. PIKER ET Al.

SPRING LOCK 2 Sheets-Sheet 1 Filed May 2, 19,55

Feb. 3, 1959 H.. M. PIKER ET AL 2,872,066

SPRING LOCK Flled May 2, 1955 2 Sheets-Sheet 2 U Kill INVENTOR. Hmsfr M P/KER BY /hv//v J. ScHz/T/JE/ss 'United rates Patent SPRING LOCK Herbert M. Piker, Wyoming, and Alvin J. Schultheiss,

Hamilton, `Ohio, assignors to Hamilton-Skotch Corporation, a corporation of Ohio Application May 2, 1955, Serial No. 505,216 12 Claims. (Cl. '220 55) This invention relates to a spring lock such as are mounted on metal boxes for retaining the cover or lid in a closed position.

Spring locks in and of themselves for the purpose above set forth are well known. In the past, however, the said locks were attached to the boxes by permanent securing means which not only required a machine operation for securing the lock in operative position but required. the preparation of the box for the lock and the complete assembly of the lock prior to its application or attachment to the box.

The spring lock of the present invention has its several parts assembled simultaneously with the attachment of the lock to the box, thereby materially saving time and effort in the assembly and attachment of the lock and box.

The present improved lock, further, cooperates with the box cover or lid for securing it in a closed position without the use of a keeper for cooperation with the lock, per se. This construction, therefore, further eliminates the production of a keeper and its subsequent attachment to the box lid or cover.

It is, therefore, the principal object of the present-invention to provide an improved spring lock for boxes having hingedly mounted thereon a lid or cover and which lock retains the lid or cover in its closed position.

Another object of this invention is the provision of a spring lock which incorporates means for securing a cover or lid in a closed position without the use of extraneous parts, such as a lock keeper, as was the case with structures heretofore known.

A further object of this invention is the provision of a spring lock that incorporates means for attaching same to the box through the use of the spring which normally biases the lock arm of said spring lock.

A still :fur-ther and specific object of this invention is the provision of a spring lock that will accomplish the foregoing objects and which may be economically produced and acquired for making possible the economic production of metal boxes which have hingedly connected thereto a lid or cover.

Other objects and advantages of the present invention will be readily apparent by reference to the following specification considered in conjunction with the accom` panying drawings forming a part thereof, and it is to be understood that 'any modications may be made in the exact structural details there shown and described, within the scope of the appended claims, without departing from or exceeding the spirit of the invention.

In the drawings:

Fig. l is a front elevational view of al box having mounted thereon a spring lock of the present invention.

Fig. 2 is an enlarged fragmentary vertical sectional view through the lock of the present invention as seen from line 2 2 on Fig. l.

v Fig. 3 is a transverse fragmentary sectional view through the lock of the present invention as seen from line 3 3 on Fig. 2.

Fig. 4 is a rear elevational view of the lock as illustrated in Fig. 2 with the housing thereof in cross section as seen from line 4 4 on said Fig. 2. l

Fig. 5 is a perspective view of the several parts or elements which make up or constitute the lock.

Fig. 6 'is a cross sectional View similar to Fig. 2 showing the improved spring lock of the present invention applied to a modifiedV form of a box.

Fig. 7 is a View partly in section and vpartly in elevation of the box of Fig. 6 showing the spring lock in operative position thereon as seen from line 7 7 on said Fig. 6. l A

Fig. 8 is a cross sectional view similar to Fig. 2 illustrating the spring lock of the present invention in connection with a further modified box construction.

Fig. 9 is a View similar to Fig. 7 partly in section and partly in elevation illustrating the box of Fig. S with the spring lock in operative position as seen from line 9 9 on said Fig. 8.

Throughout the several views of the drawings similar reference characters are employed to denote the same or similar parts.

The improved spring lock of the present invention has application to various kinds and types of boxes and is not limited in its application to the specific box disclosed in the drawings.

As illustrated in the drawings the box comprises the lower portion or box proper 10 on the upper end of which is mounted the cover or lid 11. The said cover or lid 11 may have upwardly struck therefrom hinge lugs 12 and 13 for a carrying handle 14. The said cover or lid 11 is hingedly secured along its rear edge to the upper end of the box proper 10, not shown.

The box proper has the upper ends of the front back and sides each inwardly offset to be received within the lower edge of the cover or lid 11,`as specically illustrated in Fig. 2. As shown in said Fig. 2 the boxrfront 15 has its upper end inwardly oifset as` -at 16 thereby providing a shoulder 17. The lid or cover 11 is provided with a depending front flange 18 from the top panel 19 with saididepending front 18 having its lower end turned or rolled on itself 'to provide a bead 20 as illustrated in Fig. 2; the bead 20, when the cover or lid 11 is in its closed position, is disposed on the box shoulder 17. Y

Just below the shoulder 17, the box front 15 is provided With a rectangular aperture or opening 21 in which is disposed or mounted the spring lock of the present invention, indicated in its entirety by the reference numeral 22. Y

The lock 22 comprises a housingV 23 having a front 24 from which projects a top wall 25, a bottom wall 26 and side walls 27 and`28. vThekbottom wall 25 is provided with an upper portion 29 thereby forming within the housing 23 a shoulder 30. The side walls 27 and 28 of the housing 23 are laterally extended as rvertical side wall flanges 31 and 32. V y y The housing 23 has an exterior dimension to vfreely pass through the rectangular opening 21'in the box front 15 and is adapted to be disposed outwardly of the said box 10 to have the lock housing ilanges 31 and 32 engaging the inner face of the box front 15, as most clearly illustrated in Fig. 3. The lock housing is provided in each of its side walls 27 and 28 with a tapering notch aperture or passageway 33 and 34 with said notches extending around into the housing front 24, as illustrated at 35 and 36.

Disposed within the lockhousing through the notches or apertures 33 and 34 are trunnions 37 and 38 of a lock arm or hasp 39. As illustrated in Fig. 5, the lock arm or hasp 39 is substantially U-shaped and has extending from each of the trunnions 37 and 38, an arm 40 and 41Y having their upper Vends joined by a linger piece and Patented Feb. 3, 1353 3 latching bar 42. Downwardly of the linger piece and latching bar 42, the body portion of the lock arm is laterally displaced providing a locking or latching lug 43. The locking or latching lug 43 is preferably formed by punching or stamping the body portion of the lock arm' to one side thereof, as illustrated in Fig. 2, and thereby providing a latching face or nose 44 at the lower end of the latching lug 43.

The locking arm trunnions 37 and 38 have their inner ends spaced from one another a distance to permit the passage therebetween of the housing front located between the inner ends of said housing front notches 35 and 36. The lock arm and the lock housing are connected with one another by positioning the said lock arm, while exteriorly of the housing, at a point 90 removed from the position illustrated in Fig. 2 whereupon the said lock arm is actuated to pass its trunnions through the front wall and side walls apertures 33-36 and upon the said lock arm trunnions contacting the bottoms of the lock housing side walls apertures 33 and 34 the lock arm is arranged in the position illustrated in Fig. 2, or, if desired, in a position 180 removed from said position. The lock arm and lock housing are then connected with one another through a spring indicated in its entirety by the reference numeral 45 in Fig. 5.

The spring 45 is substantially rectangular in plan having a central body portion 46 from the lower ends of which project spring fingers 47 and 4S and which lingers are slightly biased at their lower ends, as from line 49 on each of them. The spring body portion 46 has a similar pair of fingers 50 and 51 projecting from its upper edge but which fingers 50 and 51 instead of extending in substantially the same plane as the spring body portion are outwardly bent, as at 52, with the outer ends of said lingers reversely bent, as at 53. The bends 52 of each spring linger 50 and 51 is such that the ends of said fingers, particularly the bends 53 thereof, are materially offset from the body portion 46 to the extent that the saine takes up substantially all of the remaining room within the lock housing 23 between the lock arm trunnions 37 and 38 and the lock housing front 24, as clearly illustrated in Fig. 2.

The spring 45 is inserted in operative position by disposing its curved spring lingers 53 against the inner surface of the lock housing front 24 whereupon said spring is pushing into said housing until its substantially straight spring lingers 47 and 48 snap down onto the housing bottom shoulder 30. At this time the spring tension against the lock arm trunnions 37 and 38 is such as to retain the lock arm in its operative position under considerable force as illustrated in Fig. 2. j

It should be noted that the relationship of the parts is such that with the latch in the position of Fig. 2 its latching face or shoulder 44 of the holding lug 43 is on the upper surface of the cover or lid bead for thereby forcing said cover into its closed position by forcing the said bead 20 against the-shoulder 17 of the box proper.

The box illustrated in Fig. 6 differs from that illustrated in Figs. l and 2 in that when the cover or lid is in a closed position the front flange of the lid and the front wall of the box proper are flush with one another in a vertical plane.

Specifically, the lid or cover 11 has its front flange 18' with its lower end inwardly rolled to form the bead 20 at the lower end of said cover front flange to be inwardly of the lid or cover. When the said cover 3.1 is closed, as illustrated in Fig. 6, its bead 20 rests on the shoulder 17 at the upper end of the box front 15.

In order that the spring lock 22 of the present invention may have its locking or latching lug 43 operatively engage the lid or cover 11 the said lid or cover front ange 18 is provided with a louver-like opening thereby providing the projection to be engaged by the latching lug 43. Specifically, this construction comprises splitting the cover front flange 18 just above its bead 20 on the line asvaoee Cil 4 54 and inwardly bending the material 55 above the slit line 54 to provide, in effect, a socket 56 in the cover front liange 18. This construction exposes the interior bead 2() of the cover for the length of the slit, and provides, in effect, a projection 57 with which the latching nose 44 of the latching lug engages in holding the lid or cover 11 closed, all as clearly illustrated in Figs. 6 and 7.

The construction illustrated in Figs. 8 and 9 discloses the use of the improved spring lock 22 of the present invention with the so-called water shed construction of boxes. This construction, as illustrated, comprises the box proper lll having its front wall l5 devoid of an upper inwardly disposed flange, having instead said front wall 15 with its upper end outwardly rolled to form a bead 53.

The lid or cover 11" in the construction in Figs. 8 and 9 comprises said lid or cover front flange 18 as having its lower end outwardly turned as at 59 and then downwardly disposed as at 60, thereby, in effect, providing a seating shoulder 59 at the lower end of the cover front flange 18" and a sheath or skirt 60 for the joint between the box proper l0 and the cover or lid 11".

As clearly illustrated in Fig. 8 the outwardly turned portion or shoulder 59 of the box lid provides a perfect abutment or projection for engagement by the latch arm latching nose 44 of the latching lug 43.

The improved spring lock 22 is mounted on the front wall 15 of the construction in Figs. 8 and 9 in the same manner as it is mounted on the construction in Figs. 1 and 2 and as completely set forth above.

From the foregoing it will be noted that prior to assembling the lock, the lock housing was first mounted in the box aperture 21 with the lid or cover open. The lock arm is next mounted in position by inserting its trunnions 7 and 33 into and through the tapered apertures 33--36 of the lock housing and the said locking arm either positioned as illustrated in Fig. 2 or at a point substantially removed, that is, with the lock arm extending downwardly instead of upwardly as illustrated. The spring 45 is then mounted in its operative position and thereby not only tensions the lock arm but securely fastens the entire locking mechanism in operative position on the box front wall 15.

What is claimed is:

l. In a device in the class described the combination of a box having a front, a cover hingedly connected to the box actuable from an open to a closed position and including a front flange adapted to be disposed at the upper end of the box front, said box front having an aperture therethrough downwardly of its upper end, a spring lock including a housing projecting through the box front aperture to the exterior thereof, flanges from the lock housing engaging the box front inner surface laterally of its aperture, a lock arm pivotally carried by the lock housing, a spring within the lock housing tensioning the lock arm and securing the said lock housing in operative position by outwardly holding said lock housing to securely hold its flanges against the box front inner surface, and cooperating means on said lock arm and cover for securing said cover in a closed position.

2. In a device of the class described the combination of a box having a front with an inwardly projecting shoulder at its upper end, a cover hingedly connected to the box actuable from a open to a closed position and including a front flange having an outward projection at its free end disposed on the box front shoulder, said box front having an aperture therethrough downwardly of its shoulder, a spring lock including a housing projecting through the box front aperture to the exterior thereof, flanges outwardly projecting from the lock housing engaging the inner surface of the box front adjacent its aperture, a lock arm pivotally carried by the lock housing, a spring within the lock housing yieldably tensioning the lock arm and securing the lock housing in operative po sition by securing the housing flanges against the box front, and means on said lock arm for engagementwith the cover projection for securing said cover in a closed position.

3. In a device of the class described the combination of a box having a front with an inwardly projecting shoulder at its upper end, a cover hingedly connected to the box actuable from an open to a closed position and including a front flange having an outwardly projecting bead at its free end disposed on the box front shoulder, said box front having an aperture therethrough downwardly of its shoulder, a spring lock including a housing projecting through the box front aperture to the exterior thereof, flanges outwardly projecting from the lock housing engaging the inner surface of the box front adjacent its aperture, a lock arm pivotally carried by the lock housing, a spring within the lock housing yieldably tensioning the lock arm and securing the lock housing in operative position by securing the housing flanges against the box front, and means on said lock arm for engagement with the cover bead for securing said cover in a closed position.

4. In combination, a box wall having an aperture therethrough and a spring lock comprising a housing for attachment to the box wall including a front having rearwardly projecting therefrom side walls, an upper end wall and a lower end wall with flanges laterally projecting from the side walls, said lock housing projecting through the box wall aperture to have the side walls lateral anges thereof engaging the box front adjacent the aperture, a lock arm including trunnions within the housing, and a spring within the housing having a portion engaging the housing front and a portion engaging the lock arm trunnions for outwardly holding the housing and clamping the box front between the lock housing anges and lock arm trunnions for securing the spring lock in operative position and tensioning the lock arm.

5. In combination, a box wall having an aperture therethrough and a spring lock comprising a housing for attachment to the box wall including a front having rearwardly projecting therefrom side walls, an upper end wall and a lower end wall with flanges laterally projecting from the side walls, said lock housing projecting through the box wall aperture to have the side walls lateral flanges thereof engaging the box front adjacent the aperture, a lock arm including trunnions within the housing, said vhousing having notches in its sides and front through which the lock arm trunnions pass to be interior of the housing, and a spring within the housing having a portion engaging the housing front and a portion engaging the lock arm trunnions for outwardly holding the housing and clamping the box front between the housing flanges and lock arm trunnions for securing the spring lock in operative position and tensioning the lock arm.

6. In combination, a box wall having an aperture therethrough and a Spring lock comprising a housing having a front wall and side walls, a top wall and a bottom wall rearwardly projecting from the front wall, a flange laterally projecting from two opposite of said walls, said lock housing being inserted through the aperture in the box wall to have its flanges against one face of the box wall laterally of the aperture and its side walls, top wall, bottom wall and front projecting ahead of the other face of the box wall, a lock hasp including at one end a latch bar with depending arms from the ends of the latch bar that straddle the lock housing, inwardly projecting trunnions from the free ends of the depending arms disposed through the housing side walls to be inwardly of the housing, and a leaf spring including a body portion and spring fingers from its opposite ends with said leaf spring body portion engaging the lock hasp trunnions and the spring fingers engaging the housing front for outwardly projecting said housing and clamping the housing flanges against the box front.

7. In combination, a box wall having an aperture therethrough and a spring lock comprising a housing having a front wall and side walls, a top wall and a bottorn wall rearwardly projecting from the front Wall, a flange laterally projecting from two opposite of said walls, said lock housing being inserted through the aperture in the box wall to have its flanges against one face of the box wall laterally of the aperture and its side walls, top wall, bottom wall and front projecting ahead of the other face of the box wall, a lock hasp including at one end a latch bar with depending arms from the ends of the latch bar that straddle the lock housing, inwardly projecting trunnions from the free ends of the depending arms disposed through the housing side walls to be inwardly of the housing, a leaf spring including a body portion and spring fingers from its opposite ends with said left spring body portion engaging the lock hasp trunnions and the spring fingers engaging the housing front for outwardly projecting said housing and clamping t-he housing flanges against the box front, and said housing bottom wall including a shoulder for engagement by the leaf spring fingers to anchor same against displacement.

8. ln combination, a box wall having an aperture therethrough and a spring lock comprising a housing having a frontwall and side walls, a top wall and a bottom wall rearwardly projecting from the front wall, a ange laterally projecting from two opposite of said walls, said lock housing being inserted through the raperture in the box wall to have its flanges against one face of the box wall laterally of the aperture and its side Walls, top Wall, -bottom .wall and front projecting ahead of the other face of the box wall, a lock hasp including at one end a latch bar with depending arms from the ends of the latch bar that straddle the lock housing, inwardly projecting trunnions from the free ends of the depending arms disposed through the housing slide walls to be inwardly of the housing, said housing side walls and front having formed therethrough notches through which the lock hasp trunnions are ldisposed inwardly of the housing, and a leaf spring including a body portion and spring fingers from its opposite ends with said leaf spring body portion engaging the lock hasp trunnions and the spring fingers engaging the housing front for outwardly projecting said housing and clamping the housing flanges against the box front.

9. In combination, a box wall having an aperture therethrough and a spring lock comprising a housing having a front wall and side walls, a top wall and a bottom wall rearwardly projecting from the front wall, a flange laterally projecting from two opposite of said walls, said lock housing being inserted through the aperture in the box wall to have its flanges against one face of the box wall laterally of the aperture and its side walls, top wall, bottom wall and front projecting ahead of the other face of the box wall, a lock hasp including at one end a latch bar with depending arms from the ends of the latch bar that straddle the lock housing, inwardly projecting trunnions from the free ends of the depending arms disposed through the housing side walls to be inwardly of the housing, said housing side walls and front having formed therethrough notches through which the lock hasp trunnions are disposed inwardly of the housing, a leaf spring including a Ibody portion and spring fingers from its opposite ends with said leaf spring body portion engaging the lock hasp trunnions and the spring fingers, engaging the housing front for outwardly projecting said housing and clamping the housing flanges against the box front, and said housing bottom wall including a shoulder for engagement by the leaf spring fingers to anchor same against displacement.

l0. In combination, a box wall having an aperture therethrough and a spring lock comprising a housing having a front wall and side walls, a top wall and a bottom wall rearwardly projecting from the front wall, a flange laterally projecting from two opposite of said walls, said lock housing being inserted through the aperture in the box wall to have its flanges against one side of the box wall laterally of the aperture and its side Walls, top wall,

bottom wall and front projecting ahead of the other face of the box Wall, a lock hasp including at one end a latch bar with depending arms from the ends of the latch bar that straddle the lock housing, inwardly projecting trunnions from the free ends of the depending arms disposed through the housing side walls to be inwardly of the housing, a leaf spring including a body portion and spring fingers from its opposite ends with said leaf spring body portion engaging the lock hasp trunnions and the spring lingers engaging the housing front for outwardly projecting said housing and clamping the housing flanges against the box front, and an offset latohing nose carried by the latch bar.

11. In a device of the class described the combination of a box having a front with an inwardly projecting shoulder at its upper end, a cover connected to the box actuable from an open to a closed position and including a front ange having an inwardly projecting bead at its free end disposed on the box front shoulder, said cover having formed in its front flange a louver-like opening to provide a socket with a projection on the box front shoulder at the bottom of its said front flange, said box front having an aperture therethrough downwardly of its shoulder, a spring lock including a housing projecting through the box front aperture to the exterior thereof, flanges outwardly projecting from the lock housing engaging the inner surface of the box front adjacent its aperture, a lock arm pivotally carried by the lock housing, a spring within the lock housing yieldably tensioning the lock arm and securing the lock housing in operative position by securing the housing flanges against the box front, and means on said lock arm disposed in the cover socket for engagement with its projection for securing said cover in a closed position.`

12. In a device of the class described the combination of a box having a front with an outwardly projecting bead at its upper end, a cover hingedly connected with the box actuable from an open to a closed position and including a front llange having at its lower end an outwardly projecting shoulder disposed on the box front bead, a skirt depending from the shoulder to be outwardly of the box front bead, said box front having an aperture therethrough downwardly of its bead, a spring lock including a housing projecting through the box front aperture to the exterior thereof, flanges outwardly projecting from the lock housing engaging the inner surface of the box front adjacent its aperture, a lock arm pivotally carried by the lock housing, a spring within the lock housing yieldably tensioning the lock arm and securing the lock housing in operative position by securing the housing flanges against the box front, and means on said lock arm for engagement with the cover outwardly projecting shoulder for securing said cover in a closed position` References Cited in the file of this patent UNITED STATES PATENTS 123,837 Patterson Feb. 20, 1872 532,042 Eichbauer Jan. 8, 1895 693,543 Goldsmith Feb. 18, 1902 1,473,011 Chrstophel Nov. 6, 1923 1,540,489 Meltzer June 2, 1925 FOREIGN PATENTS 129,944 Great Britain July 24, 1919 105,677 Switzerland July 1, 1924

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US123837 *Feb 20, 1872 Improvement in collars for sheet-metal vessels
US532042 *Dec 19, 1892Jan 8, 1895 Trunk-fastener
US693543 *Oct 9, 1901Feb 18, 1902David GoldsmithTrunk-tray fixture.
US1473011 *Jun 18, 1921Nov 6, 1923Christophel Lewis WTrunk seal
US1540489 *May 12, 1923Jun 2, 1925Hyman MeltzerClasp device
CH105677A * Title not available
GB129944A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6102455 *Jul 30, 1997Aug 15, 2000The Plastic Forming Company, Inc.Latch structure
Classifications
U.S. Classification220/324, 70/451, 292/128
International ClassificationE05B65/52, E05B65/00
Cooperative ClassificationE05B65/52
European ClassificationE05B65/52